what is true about the following chemical reaction?

Question

anonymous · Answer

A. four new chemical bonds have been formed to replace the original chemical bonds in the reactants.
B. The mass of the products is less than the mass of the reactants.
C.the atoms in the products have undergone chemical change in order to form the products.
D.some of the atoms in the reactants could not be included in the products and are released to environment.

anonymous · Answer

A. idk 
b.idk 
c. idk
d.idk

anonymous · Answer

: l i had same question and i put a little hpe in you right :D

anonymous · Answer

i am stumped

abb0t · Answer

The only plausible answer is $\sf \color{red}{C}$. This is also known as a chemical change or synthesis.